Dental wall-bracket.



J. H. B. MACINTOSH. DENTAL WALL BRACKET. APVFLIOATION FILED JUNE 2. 1911.

Patented J an.- 14, 1913.

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INVENTOR WITNESSES J. H. B. MAOINTOSH.

DENTAL WALL BRACKET.

APPLIGATION FILED JUNE 2, 1911.

Patented Jan. 14, 1913.

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IZ VVENTOR 4 2W JAMES H. B. MACINTOSH, 0F SYDNEY, NOVA SCOTIA, CANADA.

DENTAL WALL-BRACKET.

Application filed June 2, 1911.

Specification of Letters Patent.

Patented Jan. 14,1913.

Serial No. 630,867.

To all whom it may concern:

Be it known that I, J AMES H. B. MAOIN- TOSI-I, a citizen and subject of Great Britain, residing at Sydney, in the county of Cape Breton, Province of Nova Scotia, and Dominion of Canada, have invented new and useful Improvements in Dental Wall-Brackets, of which the following is a specification.

My invention relates to brackets or supports and more particularly to a wall bracket of the type commonly used by dentists and other professional men.

An object of my invention is to produce a bracket of the above nature which shall be simple, easily and cheaply constructed, and placed upon the market at a low cost, this being the primary purpose of my invention.

Another object of my invention is to produce a bracket which may be easily controlled with one hand.

A still further object is to provide a pivotally adjustable table bearing arm which arm shall carry means for locking the table in place but which means will not prevent said table from being turned pivotally.

With the foregoing and other objects in View my invention consists in such details of construction and in the arrangement and combination of parts as will be hereinafter more fully described and specifically pointed out in the appended claims.

In describing my invention in detail reference will be had to the accompanying drawingswherein like characters denote like or corresponding parts throughout the several views, and in which Figure 1 is a view in side elevation of my invention with the table omitted. Fig. 2 is a similar view showing the front and rear housing in section, the table also being illustrated. Fig. 3 is a top plan view of Fig. 1. Fig. a is a detailed sectional view showing the mechanism for holding the table in locked relation. Fig. 5 is a horizontal sectional View taken on the line 5-5 of Fig. 4, and Fig. 6 is a detailed View illustrating a modified form of connection for the table arm.

In carrying my invention into practice I provide the usual wall bracket 1, having the outstanding lugs 2, said lugs being provided with apertures adapted to receive the pintles 3 of the pivotally swinging member which carries two outwardly extending flanges or wings 1, said wings being approximately parallel and spaced apart as shown in Fig. 3. This forms a housing or casing within which are pivoted the rear ends of the bracket arms 5 and 6, arm 5 being the uppermost and being preferably in the form of a light rod. The rear endof the lower arm 6 which is of heavier construction terminates in the form of a disk 7 which is of obvious utility in balancing the structure and throwing the weight upon the proper portions thereof. In this latter connection it is pointed out that although any suitable means may be provided for retaining the rear housing within the wall bracket 1 or in other words for holding the pintles 3 within the apertures in the out-standing lugs 2, the means illustrated in Fig. 2 has been found very satisfactory. In this figure it will be seen that the foremost portion of the lower lug 2 is broken away as at 8, this portion being of sufiicient width to permit the insertion of the pintles 3 into the aperture. The upper pintle can first be inserted in the aperture of the upper lug and the lower pintle may then be swung into place as shown in said figure. The weight of the bracket and the tendency of the outer end to be drawn downward will retain the pintles in the correct positions as illustrated.

The forward ends of the bracket arms 5 and 6 are each pivoted within a housing formed by rearwardly extending wings or flanges 9. Extending upward from the T0131 ward end of the rod 6 and in a direction approximately at right angles thereto, is a fanshaped segment 10, said segment carrying ratchet teeth 11 as will be clearly seen upon reference to Fig. 3. These teeth will be engaged by a pivoted catch 12, which is also held within said housing, said catch having a handle 13 extending out beyond the forward edges of said housing so as to be in a position adjacent to and immediately above a somewhat similar handle 14:, which may be cast integral with said housing and which may be grasped with the hand when raising or lowering or otherwise adjusting the support.

Extending upward from the foremost corner of the housing and preferably cast integral therewith is a lug 15, said lug being provided with a bore wherein a pintle 16 extending downwardly from the rear end of a table carrying arm 17 is adapted to be received. It will also be noted that a lug is formed at the lowermost portion of the member 15 so as to be adapted to be received within one end of a coil spring 18, the other end of said coil spring being engaged by a similar lug which may be cast integral with an upstanding arm 19 formed near the op erative end of the catch 12 hereinbefore described. By this construction, said catch is held in normal engagement with the ratchet teeth 11 of the segment 10.

The forward end of the table arm 17 has formed thereon, an enlarged portion 20, through which extends vertically an aperture 21 in which is received a pint-le 22. As it will be seen upon reference to Fig. 4 this pintle is provided with an annular groove 23. Figs. 4 and 5 also illustrate the fact that the portion 20 is provided with a slot therein extending laterally of said port-ion as shown at 24:. Operative through this slot so as to be received within the annular groove 23 of the pintle 22, is one end of a pivoted catch 25, said catch being disposed on the upper surface of the arm 17 and connected thereto in any desired manner as for instance by a bolt or other pivot pin 26. A thumb piece is formed upon this catch for convenience in operating the same. By this construction it will be seen that the table 27 which is carried by the pintle 22, may be swung pivotally upon its support but at the same time will be locked against vertical movement although it may be easily removed whenever desired.

It will be understood of course that many changes in these details of construction may be made if desired. One such change is illustrated in Fig. 6. In this figure the numeral 28 indicates the forward part of the housing and upstanding lug 29, being carried by said housing, said lug being provided with an annular groove 30 in which operates one end of a catch 31 which passes through a downwardly extending member carried by the inner end of the table arm 17. This is simply a modified form of connection for the inner end of said table arm which may be preferred in some instances to that form shown in Fig. 3. Any desired form of catch 31 may be employed.

It will be noted from the foregoing that I have provided an extremely simple device there being very few parts in the construction. Particular attention is called to the fact that many of the various elements are combined and formed integral with one another such for instance as the bracket arm 6 and segment, 10. This reduces the cost of the construction and at the same time increases the durability and strength of the entire support. As one of the primary objects of my invention is to provide a device which may be placed upon the market at a low cost but which at the same time will be effective in operation, the value of such details of construction as this will be readily apparent.

I desire it to be understood that many other changes in the construction and in the arrangement and combination of the various parts may be resorted to without departing from the spirit of my invention, provided such changes fall within the scope of the appended claims.

Having thus fully described my invention, what I claim as new and desire to secure by Letters Patent is 1. In a device of the character described, a bracket, a housing pivotally connected thereto, arms pivoted in said housing, the forward end of said arms being pivoted within a second housing, a fan shaped segment integral with one of said arms and extending approximately at right angles thereto, said segment having teeth, a catch pivoted within said housing and having a handle extending therefrom, said catch adapted to engage the teeth of said segment, an rip-standing member carried by said catch, a spring interposed between said upstanding member and said housing, whereby said catch is normally held in engagement with the teeth of said segment, and a table supported from said second housing.

2. I11 a device of the character described, a bracket, a housing pivotally connected to said bracket, arms pivoted to said housing, a second housing, said arms pivotally connected to said second housing, a fan-shaped toothed portion formed upon the outer end of one of said arms, a catch pivoted within said housing and having a handle extend.- ing therefrom, said catch adapted to engage said fan-shaped member, an upstanding member carried by said catch, and a spring interposed between said upstanding member and the housing for the purpose described.

3. In a device of the character described, a bracket, a housing pivotally connected to said bracket, said housing having parallel side members extending therefrom, a second housing comprising two parallel side members connected at their upper ends by means of an apertured lug, two parallel arms, the ends of said arms being pivotally mounted within said housing, the lower arm being heavier in construction and of greater length than the upper arm, a tooth segment extending at right angles to the lower arm and mounted within said second mentioned housing, a pawl mounted in said casing, an upstanding member formed on said pawl, a spring interposed between the upstanding member and said apertured lug whereby said pawl will be held into engagement with said tooth segment, a handle extending from said pawl whereby the same may be released and a table supporting member mounted on said apertured lug substan- 10 tially as and for the purpose described.

JAMES H. B. MAGINTOSH.

Witnesses:

Wu. B. RICHMOND, Fnonnnon EDWARDES.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

- Washington, D. 0. 

